pcm

I'm new to the forum and haven't found my exact issue in previous posts, so here goes. I recently purchased a 2006 Jeep Wrangler X with the 4.0 and automatic transmission from auction and quickly learned it had transmission issues. It was lagging on takeoff like it was starting off in wrong...

Hello, I have a 2001 TJ 4.0. At the beginning of this year my jeep would not start so I took it to a local mechanic. They let me know that it was most likely the PCM. They had it for a week and still could not diagnose the official problem, but adding a ground wire to the PCM seemed to bypass...

Hey y'all! I have a 98 jeep TJ with a 4.0 motor and manual trans, I brought it to a mechanic to diagnose a idling issue and someway or another the PCM got shorted out by the 02 sensor while they were driving it (so they claim). Sure enough the PCM was bad and the jeep wouldn't start. I replaced...

Hopefully this story helps someone else. I started having some electrical problems with my 2005 Sport with a 6 speed. I started getting an intermittent no crank situation. Jumping the starter would crank it, but no spark. I also noticed that my OPDA was a little loose, and it caused a crank/cam...

For the past forever ive been having issues with my wrangler from it saying I dont have a fuse, the oil pressure gauge going up and down, to the wrangler starting up very quickly one day to nothing but cranking a few days later. I took it to a fella who ran the codes for me and he says the brain...

Good morning everyone! First time poster here. Loving this resource so far. Greatly appreciate the service manuals. I have a No Crank condition. So far, I have; Ignition Cylinder (Replaced), Ignition Switch (Replaced), Neutral Safety Switch (Bench Test - good), Starter Relay (Bench Test -...

Searched the threads and I didn’t see this question asked. I’ve had the TJ for 3 years and a prior owner had removed the SKIM sensor. No problems starting and running in 3 years until recently when the engine would stall after a couple of seconds running and I got the P1686 code. I sent the PCM...

Hey Y'all I have a 2006 TJ 4.0 Auto that decided it wanted to shell the factory PCM. At first it was throwing a P0203 code and after replacing the wiring harness, it came down to there is no output from that pin out of the factory PCM. I ordered one off of WranglerFix from Mark and now the jeep...

Hello all, I am in need of assistance. Found some frame rot on my jeep and parked for a bit and was starting it every couple of weeks by the 2nd or 3rd time it just cranked and no start. I have my 5 volt reference to the crank sensor. My ASD relay and fuel pump clicks when keyed on. I tried...

Curious if anyone knows if I can put a 99 2.5 stand trans pcm into a 97 2.5 standard trans? And will it run correctly?

Got a little technical question. My 2002 tj 4.0 5 spd with 221000+ miles would occasionally stutter some but otherwise ran great. The check engine light was on and I got P1391. I swapped the cam sensor, no change. Swapped the crank sensor, let it idle 10 minutes and drove it across the yard...

HELP!! Looking for a PCM and or someone that can point me in the right direction. They are discontinued at the dealership, and lot for websites I look at are $1800 the website looks like a scam.

Hi all, The past few months I've been having troubles with my Jeep. I've looked around all over and made a post here trying to diagnose it and have come up with it maybe being the TCM. Have one ordered up and it arrives tomorrow! But today the problems got worse. I have driven the TJ 3 times...

Firstly apologies, I’ve posted quite a bit about this in the past but I’m at a loss and don’t really know what else to do. So here I am again , I’ve had some major issues with my 2004 4.0 Auto TJ that I’ve posted extensively about and had some really helpful conversations about , but...

I've heard PCMs are hard to find these days. I've got a 1998 4.0L. Codes showing #5 cylinder problem (P0205) even after I replaced injector, switched it to see if it's defective, and replaced connector. The injector is not clicking. So I'm thinking it's the PCM. One mechanic told me those are...

Greetings, new member here. I have a 1997 TJ that I bought new in January of 1997. It now has about 125,000 miles and has always been a great and dependable vehicle. The other day I tried to start it and I noticed the the CEL did not come on when I turned the key but instead the Check Gauges...

2002 4.0 manual stalled while wife was driving ☹️. Fuel gauge shows empty and won’t restart. I was thinking fuel pump died. Engine spins when attempting to start. Dropped tank - still 1/2 full of gas. When I apply 12V to electric connector at tank, pump sprays gas. I checked continuity of power...

Starting a thread to discuss/investigate some intermittent engine stumbling/staggering issues I've noticed after I bought this TJ with regards to possible compatibility issues with having a PCM from a TJ with an Automatic As per @RMETeeJay 's suggestion I've started a new thread here to post...

Starting to get a bit frustrated with trouble-shooting so hoping maybe someone has come across a similar/same issue that may have a suggestion or two on anything else to test prior to opening up the wallet :-) Purchased a 2005 TJ SE, 4.0 back in december via facebook marketplace and issues...

I THINK THIS IS MY SECOND POST AND I HAVE BEEN LOOKING AROUND QUITE ABIT ABOUT THIS ON THIS FORUM AND OTHERS. I have 2005 Rubicon 2 door inline 6 100k miles had her since 2018 automatic 42rle been getting CA emissions 4 o2 sensors : Current Issue p0031 p0037 p0051 and p0057 . I had these...